Module: RuboCop::SimpleForwardable

Included in:
AST::CollectionNode, AST::NodePattern, AST::NodePattern::Compiler, AST::NodePattern::Node, AST::NodePattern::Parser
Defined in:
lib/rubocop/ast/utilities/simple_forwardable.rb

Overview

Similar to ‘Forwardable#def_delegators`, but simpler & faster

Instance Method Summary collapse

Instance Method Details

#def_delegators(accessor, *methods) ⇒ Object 



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# File 'lib/rubocop/ast/utilities/simple_forwardable.rb', line 6

def def_delegators(accessor, *methods)
  methods.each do |method|
    if method.end_with?('=') && method.to_s != '[]='
      # Defining a delegator for `foo=` can't use `foo=(...)` because it is a
      # syntax error. Fall back to doing a slower `public_send` instead.
      # TODO: Use foo(method, ...) when Ruby 3.1 is required.
      class_eval(<<~RUBY, __FILE__, __LINE__ + 1)
        def #{method}(*args, **kwargs, &blk)                         # def example=(*args, **kwargs, &blk)
          #{accessor}.public_send(:#{method}, *args, **kwargs, &blk) #   foo.public_send(:example=, *args, **kwargs, &blk)
        end                                                          # end
      RUBY
    else
      class_eval(<<~RUBY, __FILE__, __LINE__ + 1)
        def #{method}(...)           # def example(...)
          #{accessor}.#{method}(...) #   foo.example(...)
        end                          # end
      RUBY
    end
  end
end